/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/AbilitySystemBlueprintLibrary.h
Returns the value of Attribute from the ability system component AbilitySystem after evaluating it with source and target tags. bSuccess indicates the success or failure of this operation.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintPure, Category="Ability|Attribute") static float EvaluateAttributeValueWithTags ( [UAbilitySystemComponent](API\Plugins\GameplayAbilities\UAbilitySystemComponent) * AbilitySystem, [FGameplayAttribute](API\Plugins\GameplayAbilities\FGameplayAttribute) Attribute, const [FGameplayTagContainer](API\Runtime\GameplayTags\FGameplayTagContainer) & SourceTags, const [FGameplayTagContainer](API\Runtime\GameplayTags\FGameplayTagContainer) & TargetTags, bool & bSuccess )